----- Original Message -----
> From: "Marek Hulán" <[email protected]>
> To: [email protected]
> Sent: Thursday, January 12, 2017 2:59:39 AM
> Subject: Re: [foreman-dev] Revert removal of @host.params for host_param
> 
> On středa 11. ledna 2017 14:22:53 CET Stephen Benjamin wrote:
> > ----- Original Message -----
> > 
> > > From: "Daniel Lobato Garcia" <[email protected]>
> > > To: [email protected]
> > > Sent: Wednesday, January 11, 2017 11:05:39 AM
> > > Subject: [foreman-dev] Revert removal of @host.params for host_param
> > > 
> > > Hi foreman devs,
> > > 
> > > Just noticed today https://github.com/theforeman/foreman/pull/3983/files
> > > after some comments on IRC. What's the background behind this change?
> > > 
> > > As far as I can see, this merely moves
> > > 
> > > @host.param to host_param
> > > @host.param_true? to host_param_true?
> > > @host.param_false? to host_param_false?
> > > @host.info to host_enc
> > > 
> > > without gaining anything from the change. This will force people to
> > > change their templates (including our community templates) when the
> > > deprecation is removed, and there's nothing to gain.
> > > 
> > > Does someone know what's the rationale behind this change? As it stands
> > > right now, I propose reverting that commit entirely to avoid inflicting
> > > that pain on users - which include many devs who maintain templates.
> > > 
> > > Best,
> > 
> > I know the macros look better, but it seems like a small gain for a
> > lot of pain.  A lot of users use the existing methods in parameter values
> > (ERB w/ safe mode off), and their own custom templates.
> > 
> > And the standard response to these kinds of complaints is "well, it's
> > deprecated and users have enough time to change."  But I really just
> > don't think that's sufficient, this is more change for the sake of
> > change.
> > 
> > Also, the deprecation wasn't really smooth as it broke REX tests.
> >   http://ci.theforeman.org/job/test_plugin_matrix/2466/
> > 
> > 
> > - Stephen
> 
> Hello
> 
> I strongly disagree that this does not have big benefits. Using internal
> Foreman objects in templates is a bad practice. It blocks us from improving
> our code. Therefore it's very important to build a DSL that users can use in
> templates and keep that compatible. We can then later change the
> implementation of host_param_true method without any templates changing.
> Think
> of this as a templating API.
> 
> Another less significant benefit is that for plugins it's easier to
> wrap/alias
> the template method rather than manipulating something that's used internally
> in @host. Still not ideal but that should be solved by https://github.com/
> theforeman/foreman/pull/3701
> 
> Of course it will require users to migrate to new template helpers which is
> why we move there slowly and hopefully with proper deprecations. I was hoping
> to do the update for community-templates since it's very easy migration.
> 
> If you think it's too complicated for users we could provide rake task or
> migration. But please don't revert this.

Yes, if you provided a migration it would be much better.  That doesn't
really solve the problem with people using the foreman_templates plugin
who will have those changes reverted, but I guess it's better than nothing.

There's still dozens of other things allowed for @host in the Jail that
aren't covered by these macros.   What's the plan for those?

I still think this provides more headaches than any benefits.



- Stephen

> --
> Marek
> 
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